Description:
The ABB 1SFA892014R1002 is a PST Series Electronic Soft Starter manufactured by ABB for controlled starting and stopping of three-phase AC induction motors. It limits inrush current, reduces mechanical shock to driven equipment, and minimizes voltage dips on the supply network by ramping up motor voltage from zero to line voltage according to a programmable ramp profile. The 1SFA892014R1002 typically includes an integrated bypass contactor function (in larger PST units) or is specified for use with an external bypass, and features motor overload protection, torque control, and a two-line alphanumeric display for setup and diagnostics.h2 Application Scenarios:A large HVAC plant was experiencing repeated belt-shear failures on a 90 kW chilled-water pump driven by a direct-on-line (DOL) starter — the abrupt torque step at 0.2 s was snapping the V-belts and causing a noticeable voltage sag on the 415 V bus. The service team replaced the DOL starter with the ABB 1SFA892014R1002 PST Soft Starter, programmed a 5-second current-limited ramp-up and a gentle 3-second coast-down stop. The controlled torque profile eliminated belt breakage entirely, reduced starting current from 6×FLC to under 3×FLC, and the bus voltage dip shrank from 12% to under 4%. The 1SFA892014R1002 directly solved the pain points of mechanical damage, nuisance tripping of upstream MCCB on start, and premature coupling wear — demonstrating why soft starters are the preferred retrofit for high-inertia or high-cycle motor loads in pumps, fans, compressors, and conveyors.h2
Parameter:
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1SFA892014R1002 (PST Series Soft Starter) |
| Manufacturer | ABB (ABB Low Voltage / Drives & Motors Division) |
| Product Category | Electronic Soft Starter / Reduced Voltage Starter |
| Rated Operational Current | 14 A – 370 A typical PST range — Confirm exact frame size by comparing old nameplate or catalog (this P/N commonly corresponds to PST(B) 72…105 A class; verify before order) |
| Motor Power Rating (Typical) | 7.5 kW – 55 kW @ 400 V AC (range depends on exact PST frame — e.g., PST72 = 37 kW, PST105 = 55 kW) |
| Supply Voltage (Main) | 3-Phase 200 – 480 V AC (+10% / -15%), 50/60 Hz |
| Control / Aux. Voltage | 100 – 240 V AC or 24 V DC (per specific PST version — check suffix) |
| Starting / Stopping Ramps | Adjustable 0.5 – 60 s (start), 0 – 60 s (soft stop) |
| Current Limit Setting | 0.5 × Ie – 6 × Ie (adjustable) |
| Built-In Protections | Motor overload (Class 10/10A/20/30), phase loss/unbalance, stall, over-temperature |
| Communication Option | Fieldbus plug-in (Profibus DP / DeviceNet / Modbus RTU — via optional module) |
| Mounting Method | DIN Rail (small frames) or screw-fixed to panel / inside MCC bucket |
| Operating Temp. | -25 °C to +60 °C (derating above 50 °C may apply) |
| Protection Rating | IP20 / IP00 (front — install inside enclosed MCC / cabinet) |
| Certifications | CE, UL, CSA, IEC 60947-4-2 |
h2 Technical Principles and Innovative Values:
- Phase-Controlled Thyristor Ramping with Torque Control: The 1SFA892014R1002 uses anti-parallel thyristors in each phase to gradually increase the firing angle from near-zero conduction to full line voltage. In Torque Control mode, it modulates starting voltage based on calculated motor torque demand rather than a simple voltage ramp — providing smoother acceleration on high-inertia loads (pumps, centrifuges) and preventing torque overshoot on low-inertia loads (fans).
- Integrated Bypass & Energy Saving: After the motor reaches rated speed, the ABB 1SFA892014R1002 either closes an internal bypass contactor (larger PST(B) frames) or signals an external bypass to close. This removes thyristor conduction losses, reduces heat generation in the enclosure, and improves overall system efficiency during continuous run — a significant advantage over solid-state starters without bypass.
- Comprehensive Motor Protection Without Extra Relays: Embedded thermal modeling of the motor winding heating characteristic allows the 1SFA892014R1002 to provide true electronic overload protection (selectable trip class 10/10A/20/30), eliminating the need for separate thermal overload relays (TOR) and simplifying MCC panel design and spare-parts inventory.
h2 Application Cases and Industry Value:Case 1 – Municipal Water Pump Station (Centrifugal Pump, 45 kW):A city water department replaced DOL starters on two 45 kW borehole-pump MCC buckets with the ABB 1SFA892014R1002 PST Soft Starters. Water-hammer on stop was eliminated by programming a 4-second soft-stop ramp; starting current was capped at 250% FLC, preventing nuisance tripping of the 250 A mains incomer during simultaneous starts. After 3 years, no pump-coupling or check-valve failures had occurred — previously averaging one per year — and energy savings from reduced bypass losses were measurable during summer peak-demand periods.
